The boundary between physics and mathematics is not as clear-cut as one might think.

"I guess that’s just part of loving people: You have to give things up. Sometimes you even have to give them up."

Ignoring isn’t the same as ignorance, you have to work at it.

The great use of life is to spend it for some thing that overlasts it.

森林的真正价值不是用板英尺衡量，而是用生物多样性和碳封存。